MY126665A - Optical lens system comprising two more than half-spherical lenses. - Google Patents

Optical lens system comprising two more than half-spherical lenses.

Info

Publication number
MY126665A
MY126665A MYPI20011387A MYPI20011387A MY126665A MY 126665 A MY126665 A MY 126665A MY PI20011387 A MYPI20011387 A MY PI20011387A MY PI20011387 A MYPI20011387 A MY PI20011387A MY 126665 A MY126665 A MY 126665A
Authority
MY
Malaysia
Prior art keywords
lens
objective lens
diameter
holder
accurate
Prior art date
Application number
MYPI20011387A
Inventor
Hendrikus Wilhelmus Hendriks Bernardus
Peter Baartman Jan
Theodorus Adrianus Van De Veerdonk Johannes
Original Assignee
Koninklijke Philips Electronics Nv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics Nv filed Critical Koninklijke Philips Electronics Nv
Publication of MY126665A publication Critical patent/MY126665A/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G11B7/1376—Collimator lenses
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G11B11/10545—Heads for reproducing using optical beam of radiation interacting directly with the magnetisation on the record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G11B7/1374—Objective lenses
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
    • G11B7/13925—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means
    • G11B7/13927—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means during transducing, e.g. to correct for variation of the spherical aberration due to disc tilt or irregularities in the cover layer thickness
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/22—Apparatus or processes for the manufacture of optical heads, e.g. assembly
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Lenses (AREA)
  • Lens Barrels (AREA)
  • Prostheses (AREA)

Abstract

THE INVENTION RELATES TO AN OPTICAL LENS SYSTEM (39) WHICH IS SUITABLE FOR USE IN AN OPTICAL SCANNING DEVICE (15) FOR AN OPTICAL DISC PLAYER. THE LENS SYSTEM (39) COMPRISES A FIRST LENS OR OBJECTIVE LENS (45) AND A SECOND LENS OR AUXILIARY LENS (47) WHICH ARE MOUNTED IN FIXED POSITIONS IN A LENS HOLDER (61). THE OBJECTIVE LENS COMPRISES MORE THAN ONE HALF OF A FIRST SPHERICAL LENS BODY (67) HAVING A FIRST DIAMETER (D1), AND THE AUXILIARY LENS COMPRISES MORE THAN ONE HALF OF A SECOND SPHERICAL LENS BODY (69) HAVING A SECOND DIAMETER (D2) SMALLER THAN THE FIRST DIAMETER. THE OBJECTIVE LENS AND THE AUXILIARY LENS ARE SURROUNDED BY, RESPECTIVELY, A FIRST CIRCULAR CYLINDRICAL INNER WALL (83) AND A SECOND CIRCULAR CYLINDRICAL INNER WALL (85) OF THE LENS HOLDER HAVING A DIAMETER WHICH IS SUBSTANTIALLY EQUAL TO THE FIRST AND THE SECOND DIAMETER, RESPECTIVELY. SAID INNER WALLS CAN BE PROVIDED IN THE LENS HOLDER IN VERY ACCURATE COAXIAL POSITIONS BY MEANS OF CONVENTIONAL TOOLS. IN THIS MANNER, A VERY ACCURATE CENTRATION OF THE OBJECTIVE LENS AND THE AUXILIARY LENS IN THE LENS HOLDER IS OBTAINED IN A COMPARATIVELY SIMPLE MANNER. IN A PREFERRED EMBODIMENT, THE LENS HOLDER IS FURTHER PROVIDED WITH AN INTERNAL NNULAR ABUTTING SURFACE (95) FOR A FLAT BOUNDARY SURFACE (71) OF THE OBJECTIVE LENS. SAID BOUNDARY SURFACE DEFINES THE POSITION OF AN OPTICAL AXIS (73) OF THE OBJECTIVE LENS BECAUSE SAID OPTICAL AXIS IS DIRECTED PERPENDICULARLY TO THE BOUNDARY SURFACE. THE ABUTTING SURFACE CAN BE PROVIDED IN AN ACCURATE PERPENDICULAR POSITION RELATIVE TO THE CENTER LINE (87) OF THE LENS HOLDER BY MEANS OF CONVENTIONAL TOOLS, SO THAT THE OPTICAL AXIS OF THE OBJECTIVE LENS CAN BE SIMPLY BROUGHT IN AN ACCURATE POSITION PARALLEL TO THE CENTER LINE (87) OF THE LENS HOLDER BY POSITIONING THE BOUNDARY SURFACE OF THE OBJECTIVE LENS AGAINST SAID ABUTTING SURFACE.(FIG 4)
MYPI20011387A 2000-03-27 2001-03-23 Optical lens system comprising two more than half-spherical lenses. MY126665A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00201098 2000-03-27

Publications (1)

Publication Number Publication Date
MY126665A true MY126665A (en) 2006-10-31

Family

ID=8171258

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI20011387A MY126665A (en) 2000-03-27 2001-03-23 Optical lens system comprising two more than half-spherical lenses.

Country Status (11)

Country Link
US (1) US6487026B2 (en)
EP (1) EP1185980B1 (en)
JP (1) JP2003529107A (en)
KR (1) KR100762805B1 (en)
CN (1) CN1174397C (en)
AT (1) ATE411597T1 (en)
BR (1) BR0105378A (en)
DE (1) DE60136141D1 (en)
MY (1) MY126665A (en)
TW (1) TWI230936B (en)
WO (1) WO2001073776A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001073776A1 (en) * 2000-03-27 2001-10-04 Koninklijke Philips Electronics N.V. Optical lens system comprising two more than half-spherical lenses
KR100934924B1 (en) * 2001-04-25 2010-01-06 코닌클리케 필립스 일렉트로닉스 엔.브이. Scanning device including plastic high-numerical aperture objective
EP1386315B1 (en) * 2001-04-25 2006-08-16 Koninklijke Philips Electronics N.V. Scanning device including a partly plastic high-na objective system
JP2003021770A (en) * 2001-07-09 2003-01-24 Sony Corp Objective lens, objective lens manufacturing method, optical pickup device and recording and reproducing device
JP2003066300A (en) * 2001-08-29 2003-03-05 Sony Corp Device for manufacturing objective lens and method for manufacturing objective lens
DE60314247T2 (en) * 2002-04-09 2008-01-31 Koninklijke Philips Electronics N.V. COMPOSITE LENSES WITH TURNING MIRRORS
CN1299283C (en) * 2002-08-05 2007-02-07 皇家飞利浦电子股份有限公司 Scanning device including an objective lens formed of two materials
US6876503B1 (en) 2003-10-28 2005-04-05 Contour Fabricators, Inc. Microscope drape lens protective cover assembly
JP2006085837A (en) * 2004-09-16 2006-03-30 Konica Minolta Opto Inc Objective lens unit and optical pickup device using the same
JP4050271B2 (en) * 2004-12-07 2008-02-20 シャープ株式会社 Objective lens holder, objective lens driving apparatus including the same, and optical disc recording / reproducing apparatus
JP2006285031A (en) * 2005-04-01 2006-10-19 Sony Corp Variable focus lens, optical apparatus using the same, manufacturing method of variable focus lens
US9372321B2 (en) * 2011-09-30 2016-06-21 Konica Minolta, Inc. Optical element, holding structure therefor, and optical device
CN102889549B (en) * 2012-09-12 2014-01-08 广东宏泰照明科技有限公司 Gradually-changed trapezoidal light spot lens
JP1573246S (en) * 2015-12-11 2017-04-03

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0450560B1 (en) * 1990-04-03 1998-07-22 Sumitomo Electric Industries, Ltd. An optical device
US6115347A (en) * 1996-02-12 2000-09-05 Sony Corporation Optical pick-up device, optical recording/reproducing apparatus and objective lens
JPH1069648A (en) * 1996-08-28 1998-03-10 Sony Corp Optical pickup device and adjusting method thereof
JP3787925B2 (en) * 1996-11-14 2006-06-21 ソニー株式会社 Objective lens device and recording / reproducing device
JP3608333B2 (en) 1997-03-06 2005-01-12 ソニー株式会社 Optical pickup and method of assembling objective lens for optical pickup
JPH11259894A (en) * 1998-03-06 1999-09-24 Ricoh Co Ltd Optical pickup head
EP0990232B1 (en) * 1998-04-17 2005-07-27 Koninklijke Philips Electronics N.V. Optical scanning device comprising a lens system with a compact actuator
EP1042751A1 (en) * 1998-08-07 2000-10-11 Koninklijke Philips Electronics N.V. Optical scanning device and optical apparatus for reading and/or writing information in an information plane provided with such a device
JP2000076695A (en) * 1998-09-03 2000-03-14 Tdk Corp Optical head and manufacture of the same
US6307689B1 (en) * 1998-10-21 2001-10-23 Sony Corporation Optical head and drive device for optical recording medium
JP4269471B2 (en) * 2000-02-21 2009-05-27 ソニー株式会社 Optical recording medium, optical pickup and optical recording / reproducing apparatus
WO2001073776A1 (en) * 2000-03-27 2001-10-04 Koninklijke Philips Electronics N.V. Optical lens system comprising two more than half-spherical lenses

Also Published As

Publication number Publication date
CN1381045A (en) 2002-11-20
ATE411597T1 (en) 2008-10-15
KR100762805B1 (en) 2007-10-02
US20010038499A1 (en) 2001-11-08
TWI230936B (en) 2005-04-11
BR0105378A (en) 2002-03-05
KR20020027325A (en) 2002-04-13
EP1185980B1 (en) 2008-10-15
US6487026B2 (en) 2002-11-26
JP2003529107A (en) 2003-09-30
DE60136141D1 (en) 2008-11-27
WO2001073776A1 (en) 2001-10-04
EP1185980A1 (en) 2002-03-13
CN1174397C (en) 2004-11-03

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